UPSC CSE Prelims 2003
Which of these statements is/are correct?
Statement 1 is correct. When acidic chyme, containing hydrochloric acid (HCl) from the stomach, enters the duodenum, the duodenal mucosa is stimulated to produce the hormone secretin. Secretin then acts on the pancreas, stimulating it to release bicarbonate-rich pancreatic juice. This pancreatic juice helps to neutralize the acidic chyme in the duodenum, creating an optimal environment for enzymatic activity.
Statement 2 is correct. Enterogastrone is a hormone produced in the small intestine. Its secretion is stimulated by the presence of fatty acids in the chyme entering the duodenum. The primary function of enterogastrone is to inhibit gastric motility and secretion, thereby slowing down the rate at which chyme leaves the stomach. This allows adequate time for the digestion and absorption of fats and other nutrients in the small intestine.
Options (a), (b), and (d) are incorrect because both statement 1 and statement 2 are factually accurate regarding the physiological responses in the human digestive system. Therefore, the options indicating that only one statement is correct or that neither is correct are erroneous.